Soft Scorpionate Ligands Based on Imidazole‐2‐thione Donors

Abstract

This review describes the development of the anionic soft scorpionate ligand hydrotris(methimazolyl)borate (Tm Me ), its N-alkyl and N-aryl congeners and draws comparisons where appropriate with its close relatives, the dihydrobis(methimazolyl)borates (Bm R ). Key features of the interaction of these species with metal centres, including bonding modes, elec-

Synthesis and Characterization of Sterically Congested Mesityltris(imidazolium) Salts and the Corresponding Highly Crystalline Tris-selone Derivatives

“…[13,25] Imidazole selones, as pecial class of heteroketones, have gained increasing interest in recenty ears as efficient ligating agents in lieu of traditional N-heterocyclic carbenes. In fact, mono-and bis-imidazole selones have been extensively used to generate transitionmetal-based complexes [26][27][28][29][30][31][32][33][34][35][36][37][38] and have furtherb een employed in versatile catalytic applications, such as polymerization [39] and the reduction of nitrobenzenes. [40] Moreover,s uch selenoketones have been used as inhibitors of lactoperoxidase-catalyzed oxidation and tyrosine nitration, [41][42][43] as an analogue of the antithyroidd rug methimazole, [44][45][46] in optoelectronics, [47] as chemicals ensors, [48] and also as ac hemical tool for Pd II extraction from water.…”

Strong agostic-type interactions in ruthenium benzylidene complexes containing 7-azaindole based scorpionate ligands

“…The first examples were developed by Reglinski, 1 providing a rapid expansion and diverse reactivity within the coordination and organometallic chemistry in compounds of this type. 2 The implications of such flexibility were realized by the isolation of metallaboratrane complexes; 3 the first complexes to authenticate metal-to-borane dative interactions. 4,5 Since their discovery in 1999, metallaboratrane complexes have attracted considerable attention.…”

Synthetic Bioinorganic Chemistry: Scorpionates Turn 50

“…3). In addition, related ligands based on carbene [34,35], phosphine [36,37], thioether [38], thione [39][40][41], and selone [39] donor moieties have been studied during the past 20 years or so and will be discussed in more detail below (Fig. 4).…”